PHP_SELF not working

[sayub]

Hello,
Following is my code. As I press the 'submit' button I expect the form to reload itself. But I get an error message saying that I don't have access to the page. Please help.

<html>
<head>
<title> Subscribe/Unsubscribe </title>
</head>
<body>
<form action = "<?php echo $_SERVER[PHP_SELF] ?>" method = "POST" >
<h1> Subscribe/Unsubscribe </h1>
<p><strong> Action: </strong><br>
<input type = radio name = "action" value = "sub" checked> subscribe
<input type = radio name = "action" value = "unsub"> unsubscribe
<p><input type = submit name = "submit" value = "Submit Form"
</form>
</body>
</html>

[Markus]

Take a look at the HTML source (in your browser: right click -> view source) and you'll see why.